(1)Pharmaceuticals as a Antacid(2)Fire retardant: Common uses of Magnesium Hydroxide as a fire retardant include plastics, roofing, and coatings

Pharmaceutical : Magnesium hydroxide is a common component of antacids and laxatives Suspensions of magnesium hydroxide in water (milk of magnesia) are used as an antacid to neutralize stomach acid, and a laxative.

Fire Retardant Application : Solid magnesium hydroxide also has smoke suppressing and fire retarding properties. This is due to the endothermic decomposition it undergoes at 332 °C. Common uses of magnesium hydroxide as a fire retardant include plastics, roofing, and coatings.